Internal-combustion engine.



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INTERNAL COMBUSTION ENGINE APPLIOATION FILED JULY 14, 1909 I e 3 M 3 w 6 n G. V. BENSON. I

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED JULY 14, 1909.

Patented Nov. 2, 1909;

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ixkll'nwowt whom it may concern: 1 it known that I, GUSTAV V. BENSON, a n of the United States, residin at Chicounty oi Cook, and State Illinois, invented certain new anduseful Iminvention relatesto improvements in al combustion engines, the object of vention being to provide such a design rrangement of the cylinders and valves he latter will be operated b fluid presthus obviating the use 0 cams, cam s and valve rods in an engine of this urther object of my invention is to prosimple structure in an engine which be economical of manufacture and of eiiiciency.

ier objects will appear hereinafter.

th these objects in view my invention 0 ts in the novel construction and arment of parts which will be hereinafter described and more particularly, pointe t in the appended claims.

invention will be more readily underand in which, ire 1 is a side elevation of my imd engine in its preferred forin,"Fig. 2 etail vertical section of a cylinder adn check valve, Fig. 3 is' a vertical secaken on line ra -w of Fig. 1, and Fig. 4

ntral longitudinal section.

.erring now to the drawings, 1 desigthe engine frame and 2 the crank shaft aled in the bearings 3 secured'to said V A pulley or other means may be emfor transmittin power from shaft 2. heads -6 provided on the piston rods 7 ounted to slide in the usual guides 8, nnecting rods 9 connecting said crosswith sald crank shaft. The cylinders and 12 are provided with stuffing- 13 having metallic rings 14 which are -0 with and se arated byasbestos pack- The cylin ers and 12 are power ion cylinders, and the cylinder 11 is a in cylinder piped to the explosion cylor the purpose of delivering exe gas thereto. The cylinders are arparallel as shown and the 'lstons 16 ing therein are ecauipped wit metallic packing rings 1 1 NITED STATES PATENT o eUsrrAv'vIc'ron BENSON, or CHICAGO, ILLINOIS.

INTERNAL-COMB'USTION ENGINE.

Specification of Letters Patent. 7 Application filed July 14, 1909. Serial No. 507,571. I

ments in' Internal-Combustion. Enof which the following is a specifica-' erly andgnotbetilted by gravity. chamber 32 is in the side of the valve nearest V 1 by reference to the accompanylnga power cylinderand the chamber '33;is in.

ngs forming a part of thisspecifica= Patented Nov. '2, 1909.

The engine carburetor 18 is provided with the usual throttle valve and suitable operating rods 20 111 connection therewith, sald carburetor being connected with each endofthe pumping cylinder "11 by means of the P1588 21 and 22, which are provided'fiwith or ina-ry check valves "at the point's '23 and 24- to prevent the combustible mixture or charge from returning to the carhurieter.

Thus, one carburetor. serves for the complete r engine, but it is understood that more than one carbureter maybe USGCllf deemed ada'isable in any particular engine of thczsaine general construction. Ordinary juni p spark plugs 24 are provided inthe cylinder headsat both ends of each power cylinder, and any 1 well known means for supplying current .to W

said plugs may be employed.

Charge admission check valves shown lll 75 v 2 detail in Fig. 3-are provided in the pipes;2(3..

27, 28 and 29 which connect the pumping 12. The valve-stem 30 of each admission valve is preferabl vertically disposed in order that the valve cad 31 may; seat propthe side nearest the pumping cylinder. The

cylinder 11 with the power cylinders 10and 1 o: The d.

85 l helical spring 34 on the valve-stem is adapted to maintain the valve head 31 in normal seated position.

35 designates a removable plug. I i

- Operation of the engine is as follows; When the piston;16 in the cylinder 10 i one end ofthestroke the piston 16 in the cylinder 12 isat the other,,and the explo; sions take. place simultaneously as indicated in thercyluiders, An explosion occurs in each cylinder, at both ends of the' piston stroke, or, in other words, two explosions occur in each cylinder at one revolution of f the crankshaft, four explosions occurring" in the eiigineat one crank shaft revolutiol'i.

The charge is drawn in to the pumpiiigcylf inder 11 by piston suction, first through pipe 21 then through the pipe 22, the check valves in these pipes preventing return flow of the charge. In the position of the pistons as shown in Fig. 4,'the check valve at the point 23 is closed and the admission valves 25 in the pipes 27 and 28 are open, the pistons 16 having uncovered the exhaust ports 36. It is apparent that the admission valves 25 will not open until the pistons 16 have uncovered the exhaust ports 36 to reduce the pressure against the resistance of the springs 34.-

The charging gases will now flow into the cylinders following the spent gases as they pass out through the exhaust ports 36. On the return stroke of the pistons the exhaust orts are closed and the imprisoned charg-' mg gases in each cylinder are compressed the precise details set forth, but consider myself at and then ignited by the spark plugs 24 which are in connection with the usual timing apparatus. A charge will now be forced into the other ends of the cylinders through the pipes 26 and 29, the operation being similar at each end of'the cylinders.

The important feature of the present in- 'vention is the automatic operation of the admission valves 25 whose action is dependent? solely on unbalanced fluid pressure.

Various slight changes might be made in the general form and arrangement of parts described without departing from my invention, andhence I do not restrict myself to liberty to make such changes and alterations as fairly fall within the spirit and scope of the appended claims.

Having described my invention what I claim as new and desire to secure by Letters Patent is: P

1. In an internal combustion engine, a

' frame and bearings secured thereto, a crank shaft journaled in said bearings, a charge pumping cylinder secured to said frame, a power explosion cylinder arranged on either side of said pumping cylinder, pistons operating in said 0 linders and connected with said crank shaft, heads on each end of said cylinders a carbureter and pipes provided with check valves leading therefrom to each end of said pumping cylinder, and pipes and admission check valves therein connecting the ends of each power cylinder with the ends of said pumping cylinder, substantially as described.

2. In an internal combustion engine, a crank shaft, a charge pumping cylinder and a power cylinder arranged on either side thereof, pistons operating in said cylinders and connected with said crank stuffing-boxes on. one of the heads of each aft by 5 means of pistons and connecting rods,%

cylinder having metallic packing rings sur rounded with and se mated by. asbestos packing, a centrally disposed exhaust port in each power cylinder, means for drawing in and compressing a charge in each end of said pumping cylinder alternately, and admission check valves operating toward said ower cylinders arranged in ipes connectmg the ends of each ower cylinder with the pumping cylinder, su stantially as described.

3. In an internal combustion engine, a crank shaft, three crank pins lyin in a plane passing throu h the crank sha axis, one of said crank pins adjacent the end of the crank shaft being disposed op osite the.

other two, two power cylinders an a pumping cylinder. arranged therebetween, pistons operating in said cylinders and connected with said crank pins, the pistons of said pumping cylinder and a power cylinder being connected to the two crank pins arranged on one side of the crank shaft axis, means of alternate charge admission into each end of said pumping cylinder, and

power cylinder. admission check valves arranged in pi s connecting the ends of each power cylin er with the pumping cylinder, the exhaust orts of said power cylinders being central y arranged therein, substantially as described.

4. In an internal combustion en 'ne, a crank shaft, a charge pumpingcylin er and power cylinders arranged on opposite sides thereof and provided 'with centrally ar-- ranged exhaust ports, pistons operating in said cylinders connected with. said crank shaft, means for charge admission into each end of said pum ing cylinder, pipes connecting the ends 0 each power cylinder witn the pumping cylinder, and check valves arranged in said pipes and opening toward said power cylinders, each check valve comprising .a valve head and stem, the latter projecting through the valvecasing and being surrounded by a helical spring adapted to maintain the -valve in a normally closed position, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GUSTAV VICTOR BENSON.

Witnesses: v

JOSHUA R. H. Po'r'rs, HELEN F.. LILLIS. 

